How does one get more energy?

Get tested for sleep apnea.
Practice being grateful. I find I'm usually drained when I can't find pleasure in the little things.

I have very low energy as well. But for me it is a mixture of things. I dont sleep well either but i also have depression, anxiety, i dont eat well, and i don't exercise regularly.

The best solution i ever found was a combination of well balanced meals along with regular exercise. This will also help you sleep better.

How's your diet?

Not getting good sleep can quite literally be the sole reason for your issue. So if other things are fine, work on your sleep

When you find out, let me know... I too have insomnia (which is why I'm online at 4:00 a.m.)

Blood tests for iron, b12, hormone levels etc.

Eat three home made healthy meals regularly, lime water and salads would help you stay fresh throughout even without nap. Milk products shouldn't be missed. Exercise before winding up to get sound sleep.

Fix that sleep and add a nap during daytime after lunch.